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drm/amd/display: Add NULL check for local sink in edp_power_control 

[WHY]
PNP cause bsod regression fix

[HOW]
Add NULL check

Signed-off-by: Yue Hin Lau <Yuehin.Lau@amd.com>
Reviewed-by: Hugo Hu <Hugo.Hu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yue Hin Lau 2018-06-27 13:49:20 -04:00 committed by Alex Deucher
parent c2c09ed5cd
commit 6c4fff068f
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
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@ -871,9 +871,11 @@ void hwss_edp_power_control(
unsigned long long wait_time_ms = 0;
/* max 500ms from LCDVDD off to on */
unsigned long long edp_poweroff_time_ms =
500 + link->local_sink->edid_caps.panel_patch.extra_t12_ms;
unsigned long long edp_poweroff_time_ms = 500;
if (link->local_sink != NULL)
edp_poweroff_time_ms =
500 + link->local_sink->edid_caps.panel_patch.extra_t12_ms;
if (link->link_trace.time_stamp.edp_poweroff == 0)
wait_time_ms = edp_poweroff_time_ms;
else if (duration_in_ms < edp_poweroff_time_ms)